Erasing device or board.



P. HAYS.

ERASING DEVICE 0R EGARD.

APPLICATION HLED 056.27.19ie.

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' ERASING DEVICE 0R BOARD.

Specification of Letters Patent.

Patented Oct. 15, 1918.

Application led December 27, 1916. Serial N o. 139,180.

To all whom it may concern:

Be it known that I, PAUL HAYS, a citizen of the United States, residingat Los Angeles, in the county of Los Angeles and State of California,have invented certain new and useful Improvements in Erasing Devices orBoards, of which the following is a speciication.

My invention relates to erasing devices and has particular reference toan erasing board which will enable a typist to'make erasures quickly andaccurately and without mutilating the paper.

It is Well known that much of the erasing necessary in typewritingcan bedone more easily, quicker and better out of the machine than in. Errorsdiscovered in proof-reading after the paper has been removed from themachine, and mistakes occurring near the bottom of the page are usuallyerased outside the machine.

The object of my invention is to provide an appliance by means of whicherasures may be made in both single and double-space work without injuryto adjacent writing.

Another object is to provide an erasing device of the above descriptionon which the sheets to be altered may be rapidly moved into erasingposition without picking up each sheet.

The above and other objects of the invention will be apparent from thefollowing description vtaken in connection with the drawing, in whichsimilar reference characters indicate the same parts in the severalfigures of the drawing. The invention consists of structuralcharacteristics and arrangements of elements which will be hereinaftermore fully described and particularly pointed outin the appended claims.Y In the drawings- Figure 1 is a longitudinal sectional view of anerasing board embodying my invention, the section being taken on theline 1-1 in Fig. 2.

Fig. 2 is a plan view of the erasing board,

Fig. 3 is a sectional view of another erasing board embodying` myinvention, and

Figs. 4, 5, 6 and 7 are side views of other forms of erasing devicesembodying my invention.

The form shown in Figs. 1 and 2 consists of a base member B made ofsheet metal. The base has a bottom part 10, and an up-l wardly inclinedguiding surface 11 extends upwardly from the front end of the bottom 10and is supported at the upper rear end by a downwardly bent part 12. Atthe rear end of the bottom 10 there is an upwardly and inwardly inclinedpart 13, the inner end of which is supported by a downwardly bent part111.` The side .members 15 close the openings at the'sides of the base,and with the walls 12 and 11 form a compartment 16.v

141 and behind the latter thereby pivotally securing the block to thebase B. 'I he openings 19 extend the height of the' wall 14 so that theblock may be raised out of the com-` partment 16 to turn it.

The block 17 has three parallel convex paper-supporting edges 20, 21 and22 at the points corresponding to theapexes thereof. Each edge is ofdifferent curvature from the others. In general there is only needv fortwo edges, the edge 20 being made of relatively sharp curvature forerasures in singlespace work and the edge 21 being of somewhat greatercurvature for erasures in double-space work. It is necessary to haveedges for both doubleand single-space work because the smaller andsharper surface often slightly marks the paper when held over it, whilethe double-space, being larger, does not and is easier to work on wherethe adjacentwriting is not too close to the erasure.

The third edge 22 may also be used for erasing or may be used as a coverto protect the other two edges when they are not in use. Part of theedge 22 also forms one of the feet which support the block 17. In Figs.1 and 2 a part of the edge 21, an in Fig. 3 a part of the edge 20provide the other foot upon which the block rests. These feet providemeans for rigidly supporting the block while it is in use, keeping itlevel and preventing it from turning.

Concave faces 23, 24 and 25 are formed in the sides of the block 17between the convex paper supporting faces so that the paper will extenddownwardly abruptly on both sides of the part on which the erasure isto, bev made. By lowering the lines on opposite sides of the line orpart to be erased those lines cannot be injured by the erasing insti-ufment and on account of the more pronounced elevation given the part tobe erased, the erasure may be more quickly and accurately done.

A concave facel will always 'be disposed opposite the upper end of theinclined sufrface 11, and constitutes in effect a continua` tion of thelatter. The surface 11 and concave face adjacent or opposite it servesas a meansv for guidingv sheets of paper S-from a pile upwardly onto thetop of the erasing surface which is uppermost, as is shown in Fig. 1. Byplacing a pile of sheets requiring erasuresv on the lower end of theinclined surface 11 or only partly on it, these sheets may be slid oneat a time up into position on the block 17 to make erasures.v This makesit unnecessary to pick up each sheet and place it on the block and savesconsiderable time. block 17 keep the sheets from catchingunder theblock.

- In Fig. 3 I have shown an erasing" device similar to the one shown in-Figs. 1 and 2 except that in this form a metal guiding member 26 isinserted between the upper end of the inclined surfaceY 11 and theadjacent concave face on the block 17. This guiding member 26 has aconcave face which joins the upper endof the surface 11 and the adjacent surface on the block 17 and forms a more accurate guiding device.Instead 'of a bail 18 I have shown links 27 pivoted to the block 17 andbase B respectively.

In Fig. 4 I have illustrated a form of my invention in which the entiredevice is made in, one piece, or in which the upper surface is madecontinuous. Here the inclined surface 11'1 leads upwardly to a concavesurface 231 which guides the sheet upwardly onto the top of the erasingsurface 211. The p`rinciple of operation is the same as inthe formsalready described.

The erasing device shown in Fig. 5' somewhat resemblesthe one shown inFig. 4 except that in this form I have provid-ed two erasing surfacesspaced apart, the 4surface 201 beingfor single-space work and` thesurface 212 being for double-space work. The inclined surface 112 andconcave surface 232 are continuous and serve to guide the paper ontoeither of the erasing edges. In this form it is not necessary to makeLadjustments of a sepa-rate block to bring the desired surface intoposition for use.

Fig. 6 represents a similarconstruction as that shown in Fig. liexceptthat it is pro vided with a tail piece 114 which prevents the board fromtilting backward.

Fig. 7 represents a construction similar to The concave surfaces on theFig.V 6, except that the erasing surfaces 213 and 214 arel composed ofportions of the circumferences ofV two circles, the surface-213 used fordouble-space and surface 21a for single-space erasing.

#Vhen the, sheet S has been slid into. eras.- ing position as shown indotted lines in Figs. 1 and*y 2, it mayfbe gripped on opposite sides ofthe ridges so as to hold it firmly on the surface with the part to beerased at the apex. Tolimit the amount erased along the ridge, a card C'may be employed, as shown in dotted line in Fig. 2.

The device is inexpensive, easy to handle and by itsuse much-of the dirtwhich is ordinarilyv brushed into the typewriting machinewill be keptout of the machine and' save surface adapted to supporta sheet of paperand an outerconvex paper-supporting edge adjacent to said guidingsurface and of such a curvature as tomerge into and form an upwardlyturnedextension ofthe highest portion of said inclined guidi-ng surface,whereby a sheet vor` sheets of' paper resti-ng on said guidingsurface'may be quickly and readily transferred on and be made to extenddownwardly abruptly on both sides of said supporting edge and? raise thepart of the sheet of paper on which the erasure is to be madevdistinctly above the adjacent writing,

2. As a new article of manu-facture, an erasing device'consisting of afirm base section having a surfacey adapted to support a sheet of paperand an outer convex paper supporting edge adjacent to` said surface andof such a curva-ture as to merge into and formy an extension of theportion of said surface contiguous to-the convex paper supporting edge,whereby a sheet orL sheets or paper resting on said3 surface may bequickly andf readily transferred on and be made` to extend downwardlyabruptly on both sides of said supportingedge and raise 1 the highestportion of said inclined guiding surface, whereby a sheet or sheets ofpaper resting on said uiding surface may be quickly and readilytransferred on and be made to extend downwardly abruptly on both sidesof said supporting edge and raise the part of the sheet of paper onwhich the erasure is to be made distinctly above the adjacent writing.

4. An erasing device consisting of an elongated body substantiallytriangular in transverse cross-section, the edges at the apeXes of thetriangle being convex to provide three curved paper supporting surfaces,the triangular shape of the device being such that when any one edge isin use the device will be rigidly supported on a base formed between theother two edges.

5. An erasing device comprising an upwardly inclined surface, a memberlocated opposite the upper end of said inclined surface having aplurality of convex paper supporting edges, each of said edges beingadjustable to a position above and parallel to said inclined surface,the surfaces of said member which are adjustable opposite the upper endof said inclined surface being` concave and forming continuations ofsaid inclined surface to guide sheets from the laitter onto the top sideof the upper convex e ge.

6. An erasing device comprising a base having an upwardly inclinedsurface and a substantially triangular member carried by the baseopposite the upper end of said inclined surface, said triangular memberhaving a plurality of convex paper-supporting and erasing surfaces ofdifferent diameters, said member being adjustable about its axis to moveeither of its convex erasing surfaces above said inclined surface andinto position to receive a sheet of paper thereon from said inclinedsurface.

7. An erasing device comprising a base having an upwardly inclinedsurface and a compartment at the upper end of said inclined surface, anelongated substantially triangular member fitting in said compartment,means for rotatably mounting said member and pivotally securing it tosaid base, said member having parallel convex paper-supporting edges andalso having concave surfaces adjacent and parallel to said convex edges,said member being adjustable about its axis to bring any papersupportingedge uppermost and above said inclined edge, said concave surfaces beingadapted to form continuations of the inclined surface and guide sheetsupwardly onto the uppermost paper-supporting edges.

In testimony whereof I affix my signature.

'PAUL HAYS.

Copies of this patent may be obtained. for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

